Postcracking behaviour of hybrid steel fiber reinforced concrete

This papers presents research on the mechanical performance (compressive strength, bending behaviour according to RILEM TC162-TDF) of both normal and hybrid steel fiber reinforced concrete. The investigated parameters were fiber type (shape, length) and fiber dosage. The results show that very short and short fibers affect the cracking process at small crack openings while the longer fibers provide a good ductility at larger deformations. For the mixtures with one type of fiber the absolute scatter on the results of the bending tests is much smaller than for the long fibers. In this research the synergetic effect of the combination of different types of steel fiber is ambiguous.